Researchers have discovered that cold air weakens the body’s immune response in one essential way.
This research is right on the nose.
“Cold air is associated with increased viral infection because you’ve essentially lost half of your immunity just by that small drop in temperature,” said rhinologist Dr. Benjamin Bleier, director of otolaryngology at Massachusetts Eye and Ear and an associate professor at Harvard Medical School in Boston, who co-authored the study.Scientists finally know why people get more colds and flu in winter.
Research shows that when a virus or bacteria enters the nose, it is quickly detected in the front before reaching the back and signals for the cells lining the nose to begin replicating into decoy extracellular vesicles.Shutterstock EVs have up to 20 times more receptors than original cells that enhance their ability to catch the unwanted germs, acting like little arms reaching out and grabbing the harmful particles as they are inhaled, study authors explained.
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